Revert "LAVA: Add notification_email field to LAVA job definitions"

This reverts commit 0cb59e55263a30112f510e7960cef68e3a787736.

Reason for revert: Prevented FVP tests from being run, claiming incorrect syntax

Change-Id: I62ad705d87d831324e986681ab33cd2e92fd0a68
2 files changed